oprofile on dm365 (arm926) with 2.6.32.17

gistfile1.txt

WHY oprofile
============
http://performancewiki.com/oprofile.html
"If you are performance-testing applications on Linux, then you would want to know oprofile. It is the equivalent of similar tools like tprof on AIX.
oprofile isn't hard to use at all, and quite the opposite from what people think, it is easy to use, and it casues low overhead on your system. In most instances, you will only use two of the commands that oprofile provides: opcontrol and opreport. The opcontrol command configures oprofile and manages the kernel and userspace profiling components, while the opreport command generates reports.
You can read the manuals to know more about the tool on its web site, but here are several usages that can get you start right away (after you installed it)."

UBUNTU 10.04 TEST
=================
OPROFILE: http://doc.opensuse.org/products/draft/SLES/SLES-tuning_sd_draft/cha.tuning.oprofile.html
STEP1: http://lovebug356.blogspot.com/2008/06/oprofile-setup-on-ubuntu.html
INSTEAD: of http://www.centos.org/docs/5/html/ \
Deployment_Guide-en-US/s1-oprofile-gui.html , \
I prefer the opcontrol command line.
CALLGRAPH:(it is not a graphic...): http://oprofile.sourceforge.net/doc/opreport.html
KERNEL: http://www.centos.org/docs/5/html/Deployment_Guide-en-US/pt-kernel-configuration.html
IMPORTANT: http://oprofile.sourceforge.net/doc/interpreting-callgraph.html

STEP2. THE GUI for control
apt-get install oprofile-gui
oprof_start
I don't like, not clear

STEP2.1: THE GUI for report
http://ozlabs.org/~jk/projects/hiprofile/
Fantastic
hiprofile -o profile-output
firefox profile-output
But before collect the data ... 

STEP3. More ideas
http://oprofile.sourceforge.net/examples/
http://blogs.gnome.org/bbiggs/2005/10/12/using-oprofile/

STEP4. My script
oprofile_automatic
=====================
#!/bin/bash
set -x
KERNEL=...path...
DATE=`date +"%F-%H:%M:%S"`

cat <<EOF > string_example.c
#include <string.h>
#include <stdlib.h>
#include <stdio.h>

#define SIZE 500000

static int compare(const void *s1, const void *s2)
{
        return strcmp(s1, s2);
}

static void repeat(void)
{
        int i;
        char *strings[SIZE];
        char str[] = "abcdefghijklmnopqrstuvwxyz";

        for (i = 0; i < SIZE; ++i) {
                strings[i] = strdup(str);
                strfry(strings[i]);
        }

        qsort(strings, SIZE, sizeof(char *), compare);
}

int main()
{
	int i;

        for (i = 0; i < 5; i++) {
                repeat();
		sleep(1);
	}
}
EOF

# If you want to use opannotate uncomment ggdb
CFLAGS="-Wall " 
CFLAGS+="-ggdb " 
CFLAGS=$CFLAGS make string_example

opcontrol --vmlinux=$KERNEL/vmlinux  # with debug symbols

opcontrol --deinit
opcontrol --init
opcontrol --start
./string_example
opcontrol --dump
opcontrol --stop
opcontrol --shutdown
opreport  -p $KERNEL > oprofile_report_$DATE.log
# This is clear
opreport  -p $KERNEL -% > oprofile_report_percentual_$DATE.log
opreport  -p $KERNEL --callgraph=1 > oprofile_report_$DATE.log
opreport  -p $KERNEL --callgraph=2 > oprofile_report_c2_$DATE.log
opreport  -p $KERNEL -d > oprofile_report_d_$DATE.log
opreport  -p $KERNEL -a > oprofile_report_a_$DATE.log
opreport  -p $KERNEL -l -a > oprofile_report_la_$DATE.log
opreport  -p $KERNEL -l > oprofile_report_la_$DATE.log
opreport  -p $KERNEL -f -l -a > oprofile_report_fla_$DATE.log

STEP5: opannotate
==============
You need to recompile with -ggdb, so it is intrusive on
your release setup.
CFLAGS="-Wall -ggdb" make oprofile_example
http://maemo.org/development/documentation/man_pages/oprofile/#5

STEP6: ARMEL on DM365
===================
oprofile-gui 0.9.6-1ubuntu4.4 (armel binary) in ubuntu lucid
TODO

STEP7: ARAGO on DM365
===================
TODO